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Article
Report number arXiv:2109.10673
Title Mass measurements of 99101In challenge ab initio nuclear theory of the nuclide 100Sn
Related titleMass measurements of 99-101In challenge ab initio nuclear theory of the nuclide 100Sn
Author(s) Mougeot, M. (Heidelberg, Max Planck Inst. ; CERN) ; Atanasov, D. (CERN) ; Karthein, J. (Heidelberg, Max Planck Inst. ; CERN) ; Wolf, R.N. (Sydney U.) ; Ascher, P. (CENBG, Gradignan) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Chrysalidis, K. (CERN) ; Hagen, G. (Tennessee U. ; Oak Ridge) ; Holt, J.D. (TRIUMF ; McGill U.) ; Huang, W.J. (Heidelberg, Max Planck Inst.) Mostrar todos os 26 autores
Publication 2021
Imprint 2021-09-22
Number of pages 12
In: Nature Phys. 17 (2021) 1099
DOI 10.1038/s41567-021-01326-9 (publication)
Subject category Nuclear Physics - Experiment ; Nuclear Physics - Theory
Accelerator/Facility, Experiment CERN ISOLDE
Abstract 100Sn is of singular interest for nuclear structure. Its closed-shell proton and neutron configuration exhibit exceptional binding and 100Sn is the heaviest nucleus comprising protons and neutrons in equal number, a feature that enhances the contribution of the short-range, proton-neutron pairing interaction and strongly influences its decay via the weak interaction. Decays studies in the region of 100Sn have attempted to prove its doubly magic character but few have studied it from the ab initio theoretical perspective and none have addressed the odd-proton nuclear forces. Here we present, the first direct measurement of the exotic odd-proton nuclide 100In - the beta-decay daughter of 100Sn - and 99In, only one proton below 100Sn. The most advanced mass spectrometry techniques were used to measure 99In, produced at a rate of only a few ions per second, and to resolve the ground and isomeric states in 101In. The experimental results are confronted with new ab initio many-body approaches. The 100-fold improvement in precision of the 100In mass value exarcebates a striking discrepancy in the atomic mass values of 100Sn deduced from recent beta-decay results.
Copyright/License publication: (License: CC BY 4.0)
preprint: (License: CC BY 4.0)

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 Record created 2021-09-26, last modified 2024-05-08


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